On 7 Apr 2008, Diagana was an Olympic torch runner for the 2008 Olympics. While he was running with the torch in Paris, Paris city councillor Sylvain Garel tried to snatch it from his hands.[2]

On 21 Jan 2011, Diagana was seriously injured in road accident while he was cycling along a road of the Col de Vence in the department of Alpes-Maritimes in southeast France. He was airlifted by helicopter to a hospital in Nice. He suffered head injuries and although in a serious condition, he did not lose consciousness.[1]